diff --git a/tests/unit/test_charm.py b/tests/unit/test_charm.py
index 40e6f24b..ecf9ebce 100644
--- a/tests/unit/test_charm.py
+++ b/tests/unit/test_charm.py
@@ -526,13 +526,18 @@ def test_sidekiq_env_variable():
 
     harness.set_can_connect(CONTAINER_NAME, True)
     harness.container_pebble_ready(CONTAINER_NAME)
-    plan_before_set_config = harness.get_container_pebble_plan(CONTAINER_NAME).services["discourse"].environment
+    plan_before_set_config = (
+        harness.get_container_pebble_plan(CONTAINER_NAME).services["discourse"].environment
+    )
     harness.update_config({"sidekiq_max_memory": 500})
-    plan_after_set_config = harness.get_container_pebble_plan(CONTAINER_NAME).services["discourse"].environment
+    plan_after_set_config = (
+        harness.get_container_pebble_plan(CONTAINER_NAME).services["discourse"].environment
+    )
     assert plan_before_set_config != plan_after_set_config
     assert "1000" in plan_before_set_config["UNICORN_SIDEKIQ_MAX_RSS"]
     assert "500" in plan_after_set_config["UNICORN_SIDEKIQ_MAX_RSS"]
 
+
 def test_handle_pebble_ready_event():
     """
     arrange: given a deployed discourse charm with all the required relations